Most of us don't think about our furnace until it stops working in the middle of a cold snap. But just any other appliance (or your lawn mower's blades), your furnace has a lifespan. Thus, knowing ...

Q: We’re getting our house ready to sell. One concern we have is the furnace. It’s about 17 years old, but still working fine. Is its age going to be an issue when selling? We don’t want to spend ...

Watch as I build a propane furnace from scrap steel, wool insulation, and refractory cement to replace an old coal furnace.